use https for external javascript
don't add trailing slash to file URLs
compress export files via gzip
add tracking data to export files
add release script to ./bin & document releases
tracking: handle empty user agents
migration: delete empty user agents
only track when tracking is active ...
:shipit: release 1.10.12
exit after media file handling
trim whitespace around URLs

fixes #423
add Import/Export to default modules
move im/export settings further down in menu
im/export: move post id mapping to core
im/export: future proof options export
im/export: deactivate tracking

too much data, must be handled separately
update certificate for auth.podlove.org
add missing classes in contributor template

fixes #426
fix broken contributor form

fixes #425
remove feature: "force download"